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Image 1

Top Left: The staff lines were printed with ink containing large quantities of zinc. When the sensors only look for X-rays associated with zinc, the obscured staff lines become clearly visible. Top Right: The handwritten musical notes were drawn using an iron gall ink. When focusing on only X-rays associated with iron, the musical notes reappear from behind the black smudges. Bottom Left: The front of the page combining the musical staffs and notes. Bottom Right: The back of the page. (SLAC)

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Image 1